<?php
function brilliant_gallery_help($path, $arg) {

 
$output = '';

  switch (
$section) {
    case
"admin/help#brilliant_gallery":
     
$output = '<p>'. t("Highly customizable Drupal module creating a table gallery of quality-scaled images from any number of folders.") .'</p>';
      break;
  }

  return
$output;
}
?>

$section should be $path?